Ozone Hourly Averages

Ozone is a form of oxygen with three atoms instead of the usual two atoms. It is a photochemical oxidant and, at ground level, is the main component of smog. Unlike other gaseous pollutants, ozone is not emitted directly into the atmosphere. Instead, it is created in the atmosphere by the action of sunlight on volatile organic compounds and nitrogen oxides.

In Texas, higher levels of ozone usually occur on sunny days with light winds, primarily from March through October. An ozone exceedance day is counted if the measured eight-hour average ozone concentration exceeds the standards.

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Click on the Plot Data button once the tabular report has been generated to open a separate window containing data plots.

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Region	CAMS	Morning												Afternoon								CAMS	POC	Entity
Ozone Hourly Averages for Friday, July 26, 2024. measured in parts per billion
Region	CAMS	Mid	1:00	2:00	3:00	4:00	5:00	6:00	7:00	8:00	9:00	10:00	11:00	Noon	1:00	2:00	3:00	4:00	5:00	6:00	7:00	CAMS	POC	Entity
Dallas-Fort Worth - all times are in CST
	13	15	16	17	16	16	10	7	18	18	22	28	30	35	41	50	57	60	61	50	NA	13	2 ^R ^MDL	TCEQ
	17	23	20	16	16	19	19	22	24	25	26	32	37	41	46	52	60	64	64	57	NA	17	2 ^R ^MDL	TCEQ
	31	23	20	19	24	24	23	20	19	26	30	32	34	37	36	37	38	37	36	33	NA	31	1 ^R ^MDL	TCEQ
	56	18	16	14	15	14	11	14	21	24	27	31	34	37	39	42	44	44	44	44	NA	56	1 ^R ^MDL	TCEQ
	61	16	17	19	18	15	14	15	14	21	26	31	36	41	45	44	44	41	41	32	NA	61	1 ^R ^MDL	TCEQ
	63	22	22	22	21	18	16	14	19	17	22	28	31	36	41	39	39	37	35	32	NA	63	1 ^R ^MDL	TCEQ
	69 ¹	16	14	13	12	12	10	7	9	16	23	24	25	27	26	27	27	26	26	24	NA	69 ¹	1 ^R ^MDL	Other Gov
	70	20	18	16	16	18	18	19	17	21	24	28	31	37	41	49	52	49	47	38	NA	70	1 ^R ^MDL	TCEQ
	71	12	11	10	9	7	7	9	14	17	21	21	22	27	30	28	30	29	30	31	NA	71	1 ^R ^MDL	TCEQ
	73	23	23	24	21	20	20	16	23	26	28	31	34	39	45	48	49	51	46	42	NA	73	1 ^R ^MDL	TCEQ
	75 ²	16	15	13	9	14	18	17	19	22	29	33	39	46	46	48	51	58	63	67	NA	75 ²	1 ^R ^MDL	TCEQ
	76	12	10	11	13	10	9	5	13	20	21	24	29	35	40	46	49	54	54	54	NA	76	1 ^R ^MDL	TCEQ
	77	18	17	15	18	16	14	15	16	25	27	29	29	32	39	41	40	40	37	34	NA	77	1 ^R ^MDL	TCEQ
	401 ³	17	16	14	14	14	9	6	5	15	21	PMA	PMA	37	40	42	43	42	CAL	CAL	NA	401 ³	3 ^R ^MDL	Other Gov
	402 ¹	17	15	17	14	10	8	8	13	17	30	31	34	34	38	41	43	38	33	32	NA	402 ¹	1 ^R ^MDL	Other Gov
	1006	8	5	4	11	14	10	4	9	15	23	23	26	28	29	30	30	28	27	28	NA	1006	1 ^R ^MDL	TCEQ
	1032	14	11	9	8	5	3	7	14	29	30	32	33	35	36	35	36	39	38	34	NA	1032	1 ^R ^MDL	TCEQ
	1044	12	13	8	4	5	6	6	13	21	21	23	25	27	29	30	29	30	31	29	NA	1044	1 ^R ^MDL	TCEQ
	1051	20	16	11	13	15	15	13	14	SPZ	19	21	26	28	30	32	30	30	26	26	NA	1051	1 ^R ^MDL	TCEQ
		Notes: ¹- These sites are maintained and operated by the City of Dallas. ²- These sites are maintained and operated by AECOM for North Texas Commission (NTC). ³- These sites are maintained and operated by the City of Dallas (Met NOx O3 SO2 CO). TCEQ does not certify the validity or quality of data it hosts from other monitoring entities.
		Maximum values for the day are bold within the table. Minimum values are *bold italic*.
		^R - Data from this instrument meets EPA quality assurance criteria for regulatory purposes.

PLEASE NOTE: This data has not been verified by the TCEQ and may change. This is the most current data, but it is not official until it has been certified by our technical staff. Data is collected from TCEQ ambient monitoring sites and may include data collected by other outside agencies. This data is updated hourly. All times shown are in local standard time unless otherwise indicated.

Following EPA reporting guidelines, negative values may be displayed in our hourly criteria air quality data, down to the negative of the EPA listed Method Detection Limit (MDL) for the particular instrument that made the measurements. The reported concentrations can be negative due to zero drift in the electronic instrument output, data logger channel, or calibration adjustments to the data. Prior to 1/1/2013, slightly negative values were automatically set to zero.

Texas Commission on Environmental Quality

Ozone Hourly Averages